Lock for double-hung windows



A Pl'l 23, 1940- G. M. GRADY er AL j 2,198,161.

LOCK FOR DOUBLE-KUNG WINDOWS Filed Feb. 18, 1938 Inventor-s:

` George MG'r'ady. Henr- FRuber' 353W M1 MM 'ttor-nays.

@upper top check rail of Patented Apr. 23, 1940 UNITED STATES PATENT OFFICE LooK Foa DoUnLE-HUNG WINDOWS George `M. Grady, Browndale Park, and Henry F. Ruberg, Minneapolis, Minn., assignors toThe Flour City Ornamental IronV Company, Minneapolis, Minn., a corporation Application February 18, 1938, `Serial No. 191,208

2 claims. (o1. 292-52) Our inventionrelates to locks for double-hung windows, and has for its object to provide a locking devicewhich shallbe at the same time burglar-proof, fully protected from rain `or sleet or any `other adverse weather condition, and `whichshall be entirely removed from the top surface ofthe cross sash rail, or checkirail.

`It is'alfurther object of our invention to provide a ,lock of the above type wherein the lock may become eifective only when the check rails are in` proper position, and in which thecondition ofthe rail when it is unlocked will be visually indicated by the locking handle:

It is a further object of our invention to provide locking means having the operative parts 'thereof enclosed `within a recess formed `in the the lower sash and in which the operating parts shall extend through the sideof said check rail.`

f. It is afurther object of our invention to provide `a rotary locking device extending horizontally through the side of the top check rail and having thereon a handle which will be held in the horizontal position when' the check rails'are not locked together, which always will return to horizontal position when I effected, and which will remain in a vertical position when the lock has been set, thus indicating visually the fact of whether or not the lock has been properly set.

Itis a further object of our invention to mount and arrange the locking members relative to one another so that they never can contact or jam when the sash rails are brought past one another in raising or lowering either of the sash.

The full objects and advantages of our inven.

tion will appear in connection with the detailed spective view of the front plate description thereof and its novel features are particularly pointed out in the claims.

In the drawing, illustrating an application of our invention:

Fig. 1 is a longitudinal sectional view taken on line I-I of Fig. 2. Fig. 2 is a transverse sectional view taken on `line 2 2 of Fig. 1. Fig. 3 is a View similar to Fig. 1 with the parts shown in unlocked position. Fig. 4 is a transverse sectional View taken on line 4-4 of Fig. 1. Fig. 5 is a view similar to Fig. 4 with the parts held in unlocking position. Fig. 6 is a perspective view of the frame member mounted in the check rail for supporting the locking device. Fig. 7 is a peror keeper member which surrounds the front of the locking member.

As illustrated, the top check rail I of the locking has not been 1 inner sash has a lip I I adapted to engage a pro- Jecting-lip` I2 on the bottom checkrail I3 of the upper sash. `The check rail I0 also has a projecting ilange member I4 adapted to engagean angularly-disposed flange member I on` the bottom check rail I 3; Mounted within openings I6` and I'I in the top check rail member I0 is a tubular supporting device 1`I8 which is formed with a head I9 and a central opening 29, as clearly shown in Fig. 6.` Mounted upon head I9 is a keeper plate 2 I, shown in detail in Fig. 7. This keeper plate extends outside of a catch member `22 which is splined to move with a shaft'23 journaled inthe aperture of `holding piece I8 and having a tubular head l24, Figs. 1 and 2, secured thereto by ascrew or The keeper plate 12| on shaft 231 other device. and the shoulders 25 on head 24 `hold the shaft 23 positioned withinthe` piece I8 and with its end projecting through an opening 26 `in keepeiw plate 2I. Upon this projecting end of `shaft 23 is positioned a locking lip 2l which is `adapted upon rotation of shaft 23 to take under a flange lip 28 on a locking plate 29 fast` on `the lower check rail I3 of the upper sash, as clearly shown in Figs. 1 and 3. A coiled spring 30 surrounds the shaft 23 within the holding piece I8 and operates as both a torsion spring tending to rotate shaft 23 and a compression spring tending to move it outwardly.` The keeper plate 2| hasside flanges 3I and 32, as clearly shown in Figs. 4, 5 and 7, and these side flanges are provided with cut-out portions 33 and 34 as shown in Figs. 4, 5 and 7. The catch' member 22 is held between `the head I9 on shaft 23 and the keeper plate 2I, and the shaft 23 is capable of sliding movements through said catch member 22. The plate 2`I is held in position by means of screws 35 and 36. A handle 31 is secured to the head 24 `by means of which 'the shaft 23 may be projected inwardly against `of Fig. 1.

The operation of our locking device is as follows: With the parts in non-locking position as shown in Fig. 3, thecheck rails I0 and I3 are free to move away from each other either by lowering of the upper sash or raising of the lower iso sash, the spring 30 having at the same time ro-v tated the locking lip 21 and projected shaft 23 and parts assembled thereon outwardly, all as clearly shown in Fig. 3. When the two check rails are brought together so that lip II contacts lip I2 and depending flange member I4 contacts ob1iquely-disposed lip I5, ,the check rails are normally drawn into closing relation. The operator then pushes in on handle 31 in the position of Fig. 3 until it engages the locking plate 29, and at the same time rotates the shaft 23 so as to force they locking lip 21 under the depending locking flange 28 on locking plate 29. When this has been accomplished the window is locked andthe parts will be held by frctional engagement in the position of Fig. 1 with the handle 31 turned down. If the parts are not properly brought together so that the locking lip 21 cannot be forced under the locking flange 28, im-

mediately upon releasing handle 31 it will by' spring'ilbe restored to the inoperative 'position of Fig. 3 wherein the handle 31 is horizontal, indicating that the lock has not caught. If, however, the parts are properly positioned so that the locking lip 21 takes under the locking flange 28, the pressure exerted in forcing these parts together by means of handle 31 will produce such frictional engagement as to hold the parts in 'position with the locking handle 3'Iv down, which gives visual indication that the window at the check rails is locked.

The advantages of our invention have appeared in connection with the detailed description thereof. The locking device leaves the top check Vrail of the, lower sash entirely free from any bstructions wherek it can be easily kept clean. The cavities through which the locking member extends throughV the side of the top check rail are entirely enclosed against weather by the engagement of the depending flange member I4 with the obliquely-disposed flange member I so that water or snow cannot get in to the inside locking cavity formed by the two cooperating check rails. The handle 31 can be down or in a vertical position only when the check rails of the window are properly locked together. Always if the window is not locked anreasily recognizable indication of that fact is given byl the horizontal position of the handle 31.

We claim:

1. In combination with the check rails of double-hung windows, a lock comprising a rotatable shaft on one rail having a handle and a locking lip, a flange adapted to interlocktherewith on the other rail, a spring associated with said shaft and operative simultaneously to hold it outwardly so the lip and ange cannot be engaged and to hold it rotated so the handle will occupy a horizontal position below the top ofthe check rail, a pair of stationary stops, and cooperating stops operable to longitudinal position of the shaft and rotatable therewith to limit the rotative movement of the shaft and cause the handlev to be held fixed in non-locking andy locking positions, said .lastnamed stops being mounted on the shaft to permit longitudinal movement of the shaft relative to the stops.

2. In combination with the check rails of double-hung windows, a lock comprising' a rotatable shaft on one rail having a handle andY a locking lip, a ange adapted to interlock therewith on the.

other rail, a-housing about said shaft provided with oppositely disposed openings forming shouln ders, a stop washer splined on said shaft hav.-

ing portions adapted to extend through said openings and engage -one or the other of said shoulders to limit rotative movement of the shaft, said shaft being mounted to be projected longitudinally through said washer so that rotation thereof will bring the lip on the shaft under y.the flange on the check rail,and a spring` forlreturning the Shaft to initial position after the lip and flange have been disengaged, said position being Xed by engagement of a stop portion Within the opening against one of said shoulders.

- v GEORGE M. GRADY. HENRY F. RU'BERG.

engage the xed stops in any 

